John kelsey



JOHN KELSEY, F DETROIT, MICHIGAN, OF DETROIT, MICHIGAN,

s'rnfrss WHEELHUB.

To all whom t may concern.'

\Be it known that I, JOHN KnLsEY, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented .certain new and useful Improvements in Wheel- Hubs, of which the following is a specification, reference being had therein to the accompanying drawings. The invention relates to wheel hubs of that type provided with an enlarged recess for the reception of roller bearings. It is the object of the .invention to obtain a construction which may be manufactured at 15 low cost and which possesses all of the strength requisite for the work which is to be performed. In' the present state of the art hubs of vthis type are u sually formed from forged blanks. `These are .necessarily formed of a shape which requires the removal of considerable stock by machining, with a result that the cost is increased, first, by the amount of metal required in the original blank; and second, by the labor of removing the surplus metal by machining. With my improved s construction I have avoided this two-fold objection by first forming the hub from pressed sheet metal and by then reinforcing a portion ofthe sheet metal Wallsto produce the required" thickness and strength. It is, however, necessary to so unite the sheet metal blank and its reinforcement as to transmit the torsional stresses from one to the other, and on account of the slight thickness of the sheet metal wall this becomes a difficult matter. I have therefore devised a construction in which the inner circumferential face of the sheet metal blank and the 40 outer face of the reinforcing member vare correspondingly serrated or broached, so that when engaged with each other a strong mechanical joint is formed without weakening the walls of the sheet metal member. In the drawings: A Figure l is a' longitudinal section through the hub; and

Fig. 2 is a sectional elevation thereof.

A is the pressed sheet metal member .which is formed with a cylindrical portion B, an enlarged cylindricall portion C for formlng .pressed from ting the torque.

. oint ing therefor,

specification of Lettersratent. Patented July 1.5', 1919. Application led December 4, 1914. Serial No. 875,506.

the recess for the bearingand the outwardlyextending flange D. This blank may e sheet metal by a` method forming no part of the present invention, and when complete the two cylindrical portions B and C are concentrically arranged and are i united to each other by a Haring portion E.

To provide the necessary thickness of wall for the portion B which isto engage the aXle a reinforcing bushing F is placed therein. This bushing is formed with a tapering bore G for fitting the tapering shank of the aXle and also with a splineway H. The thickness of the Walls of this reinforcement is suiicient to provide the. requisite strength with a spline of suitable dimensions for transmit- The torque' must also be transmitted from this reinforcement member to the cylindrical portion B of 'the pressed sheet metal member, and as the walls are too thin for the cutting of a splineway therein, I have devised a construction of as followsz-The outer cylindrical surface ofthe member F is longitudinally serrated by a breaching operation so as to produce a series of teeth extending around the periphery. The inner cylindrical face of the portion B is also broached with corresponding serrations and such as to exactly' fit upon the serrated face of the member F. The two members are then pressed together' -and the joint between is further strengthened by brazing so as to `produce in effect an integral' structure. The. structure is then trued by mounting the member F upon a suitable vmandrel and by taking a slight iinishing cut over the portion C and flanged portion D. f What I claim as my invention is 1. A Wheel hub, comprising a .pressed sheet-metal member and a reinforcing bushsaid members having complebroached faces forminga multiplicity of longitudinally-extending interlockin serrations of slight depth relative to the thickness of the sheet-metal, said bushing and sheet-metal member being pressed into engagement with eachv other.'

2. A wheel hub, comprising a pressed sheet-metal member of substantially uniform gage, forming concentric cylindrical mentary ortions of different diameters, and a reinsheet-metal member being pressed into enorcing bushing for the portion of. smaller -gagement with each other. 10 diameter, said bushing and engaging por- In testimony whereof I affix my signature tion being provided With complementary in presence of two Witnesses. breached faces forming a' 'multiplicity of JOHN KELSEY. longitudinallyextending interlocking serra- Witnesses: 'tions of slight depth relative to the thick'- L. H. MCCRACKEN,

ness of the sheet-meta1, said bushing and L. C. BROOKS. 

